Feeding device for producing spiral stitches



April 28, 1925. 1,535,966

- BL-TUCKER FEEDING DEVICE FOR nobucme sPiRAL STITCHES Filed Au. 5, 19212 Sheets-Sheet 1 WITNESSES INVENIOR I 2 Boers filers? I v j 1,535,966 7B. TUCKER Filed Auz. 5', 1921 2 Sheets-Sheet 2 FEEDING DEVICE FORPRODUCINGSPIRAL S TI'I'CHES I All April 2 1925.

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Patented Apr. 28, 1925.

- UNITED STATES PATENT oFFic I BORIS TUCKER, OF BROOKLYN, NEW YORK,ASSIGITOR OF ONE-HALF TO SAMUEL GREENSTEIN, OF BROOKLYN, NEW YORK.

FEEDING- nEvroE FOR PRODUCING SPIRAL STITCHES.

Application filed August 5, 1921. Serial N'o. 4.90pm.

To all whom it may concern:

Be it known that I, Boar's TUCKER, a citizen of the United States ofAmerica,and a resident of the city of New York (borough of Brooklyn), inthe county of Kings and State of New York, have invented a new andImproved Feeding Device foryProducing Spiral Stitches, of which thefollowing is a full, clear, and exact description.

My invention has for its object to provide means for automaticallymoving, relatively to a sewing .machine, a holder in which the goods aredisposed during the sewing process.

Still further objects of the invention are to provide a constructionhaving means for operating the work holder to produce a spiral stitch,the construction being such that it may be readily attached to a sewingmachine; to provide adjustable means for moving the work holder at apredetermined speed relatively to the speed of the sewing machine; toprovide an improved holder in which the goods are disposed during thesewing process and to provide means for disconnecting the work holderfrom its operating means as soon as it reaches a predetermined pointrelatively to the sewing machine.

Additional objects of the invention will appear in the followingspecification, in which the preferred form of my invention is described.

In ,the drawings similar reference characters refer to similar parts inall the views of which t Figure 1 is a front elevation of my invention.

Figure 2 is a plan View of Figure 1.

Figure 3 is a transverse sectional View of Figure 1.

Figure 4% is an enlarged fragmentary sectional view illustrating thegearing by which the speed ofjthe work holder may be controlledrelatively to the speed of the sewing machine.

Figure 5 is a fragmentary view illustrating the stitching.

Figure 6 is an enlarged plan view illustrating a modified form of thework holder.

Figure 7 is a sectional view on the lines 77 of Figure 6.

By referring to the drawings it will be seen thatparts of a sewingmachine are illustrated as, for instance, a sewing ma-v chine. frame 10,ahead 11 and a foot 12.

My device has a frame 13 with a horizontal portion 14: which isadapted'to be disposed against the bottom of the frame 10 and be held inposition by means of the screw 15, which is disposed through an orifice16 in a work rest 17 and through an orifice 16 in a depending portion 18of the frame 14, and through an orifice 16 in the frame portion 14, thebolt having a thread meshing in a threaded orifice 19 in the frame 10.The work rest 17 is secured to the depending portion 18 of the frame.

The frame 13 has extending and vertically disposed portions 20 and'21,having hearings in which is journaled a shaft 22; this shaft carrying apulley 23 which, as will be seen by referring to Figure 3 of thedrawings, is engaged by a sewing machine belt 2 1 by which means theshaft 22 is rotated. Journaled in bearings 25 in the frame13 there is ashaft 26 which is driven by shaft 22 by means of gearing 27 the saidshaft 26 being a means for driving the shaft 28 by means of the gearing29. The said shaft 28 is journaled in bearings 30' in the frame 13.Mounted on this shaft 28 there are gears 31, 32 and 33 which differ indiameter as is best shown in Figure 4: of the drawings. There is a slot.34 in the shaft 28 which is hollow, and disposed in this slot 34 thereis a key 35 which is mounted on a spring 36 secured to the stud 37 at 37This key 35 is provided for engaging any one of the recesses 38 inthegears 31, 32 and 33. It will be understood that when this key 35 engagesthe. recess 38 in the gear 33 as shown in Figure 4 of the drawings, thatthe said gear 33 will rotate with the shaft 28 and that when it isout ofengagement with the gear 33 and is disposed in the recess 38 in the gear32 that the gear 32 -will rotate with the shaft 28 instead of the gear33. By this means any one of the gears 31, 32 and 33 may be secured forrotating with the shaft 28. The key 35 is curved so that it may bepushed inwardly or outwardly into or out of engagement with any one ofthe gears 31, 32 and 33, and as a means for indicating the position ofthe key 35 relatively tothe recess 38 in one of the gears I provide thestud 37 with annular grooves 39, and I provide the gear 29* with acircular groove 40 in which a circular spring ll is disposed, it beingunderstood that when the stud 37 is pressed inwardly the spring 41 willexpand out of the annular groove 39 in which it has been disposed andwill slide on the stud 37 until it reaches the next annular groove 39.

In bearings 42 in the frame 13 there is journaled a shaft 43, gears 44,and 46 being keyed to this shaft 43, the gear 44 meshing with the gear31, the gear 45 meshing with the gear 32 and the gear 46 meshmg with thegear 33. This shaft 43 has a thread 47.

The bottom 48 of the work holder 49 illustrated in Figures 1, 2 and 3 ofthe drawings has a depending member 50 with a bearing 51, in which astud 52 is disposed, this stud 52 having a tooth 53 for engaging thethread 47 of the shaft 43. Around the stud 52 there is a spring 54 whichengages the bearing 51 and the collar 55 on the stud 52 for holding thetooth 53 yieldingly in engagen'ient with the thread 47.

As will best be seen by referring to Figure 1 of the drawings, there isa horizontal slot 56 in the frame 13 and slidably in this slot 56 thereis a means for securing a bracket 57 to the frame 13 in an adjustedposition, the said bracket 57 having a bifurcated cam 58 for engagingthe button 59 on the stud 52 and pressing the stud downwardly so thatits tooth 53 will be disengaged from the thread 47 when the work holder49 is moved to a predetermined position relatively to the sewingmachine. By this means the movement of the work holder relatively to thesewing machine may be stopped when the work holder reaches apredetermined position relatively to the sewing machine.

The bottom 48 of the work holder is provided with a slot 60 and abracket 61 is adjustably secured to the said bottom member 48 of thework holder by means of a bolt 62 which passes through an orifice in thebracket 61 and is disposed in the slot 60; a nut 63 engaging the bolt 62below the bottom member 48 of the work holder. The upper member 64 ofthe work holder is hinged to the bracket 61 at 65, the forward and rearof the upper member of the work holder being bent downwardly to engagethe work 65 and to keep a certain amount of pressure on the work 65 asit passes through the work holder 49. The bottom member 48 of the workholder has a guide 66 and the upper member 64 of the work holder has aguide 67, these guides being disposed between the bottom and the uppermembers of the work holder to guide the goods through the work holder.The up per member 64 of the work holder also has a depending projection68 for engaging the sides of the bottom member 48 and the bottom member48 has upwardly extending projections 69 for engaging the sides of theupper member 64, these projections 68 and 69 being preferably continuousof the guides 66 and 67. The upper member 64 also has a locking member70 which is provided with a slot 71 in which a set screw 72 is disposed,this set screw meshing in a threaded orifice in the upper member 64. Tothe bottom member 48 of the work holder there is secured a bracket 73having a bearing 74 in which a stud 75 is disposed, this stud 7 beingadapted to engage the locking member 70 at a recess 7 6. There isabayonet slot 77 in th bracket 73 in which a mem ber 78 is adapted totravel, this member 78 being screwed to the stud 75. It will beunderstood that when this member 78 is moved rearwardly and turned toone side, it will hold the stud 75 out of engagement with the recess 76in the locking member 70. Ther is a spring 79 in the bearing 74 whichholds the stud 75 yieldingly forward. The adjustable arrangement forsecuring the locking member 7 O to the upper member 64 of the workholder is provided so that when the upper member 64 of the work holderis moved and is secured in an adjusted position with the guides 66 and67 a predetermined distanc apart by means of the adjustment of thebracket 61 relatively to the bottom member 48 of the work holder thatthe locking member 70 may also be adjusted so that the stud 75 willengage the recess 76 therein. Extending from the depending member 50there is an arm 80 for holding the goods which are being sewed out ofcontact with the depending member 50 and the shaft 43, so that thematerial, when it leaves the material rest 17, will be brought forwardbefore it passes through the work holder 49.

In the modified form of the work holder as shown in Figures 6 and 7 ofthe drawings it will be seen that the bottom member has sides 86 andlugs 87, there being recesses 88 in the lugs 87 in which are nor mallydisposed studs 89 which are held in bearings 90 in a transverse member91, secured to the top of the upper member 92 of the said work holder.The studs 90 are held yieldingly away from each other by a spring 93 andsaid studs may be drawn inwardly and out of the recesses 88 by means ofthe buttons 94 which are secured to the studs and which project throughslots 95 in a transverse member 91. As has been said with reference tothe work holder illustrated in Figures 1, 2 and 3, the upper member 92of this work holder is bent downwardly at its forward end 96 and also atits rear end 97 for engaging and holding work as it passes through thework holder.

The handle 37 is rotatably mounted on the stud 37, and by means of thishandle 37 the stud may at all times be conveniently adjusted.

hat I claim is 1. In a feeding device for producing spiral stitches, aframe adapted to be secured to the frame of a sewing machine, a shaftjournaled in a bearing in the first frame, means for rotating the shaftadapted to be engaged by a moving part of the sewing machine, a secondshaft, means by which the second shaft is adapted to be rotated by thefirst shaft, a third shaft having a thread, a plurality of gears ofdifferent diameters secured to one of the last two mentioned shafts, aplurality of gears of different diameters meshing with the first gearsand mounted on the other of the said last two mentioned shafts,selective means to secure a predetermined gear of the last mentionedgears to the shaft on which it is mounted and a work holder having atooth for engaging the thread on said third shaft.

2. In a feeding device for producing a spiral stitch, a frame adapted tobe secured to a frame of a sewing machine, a shaft, means by which theshaft is adapted to be rotated by moving part of the sewing machine, asecond shaft having thread, a plurality of gears of different diameterssecured to one of the shafts, a plurality of gears of differentdiameters meshing with the first gears and mounted on the other shaft,selective means to secure a predetermined gear of the last mentionedgears to the shaft on which it is mounted, and a work holder having atooth for engaging the thread on the second shaft.

3. In a feeding device for producing a spiral stitch, a shaft, asecondshaft having a thread, a plurality of gears of different diameterssecured for rotating with one of the shafts, a plurality of gears ofdifferent diameters mounted on the other shaft and meshing with thefirst gears, selective means to secure a predetermined gear of thesecond mentioned gears to rotate with the shaft on which it is mounted,a work holder and means by which the thread on the second shaft isadapted to move the work holder relatively to the axis of the secondshaft.

4. In a feeding device for producing a spiral stitch, a frame w1th abear-111g, adapted to be detachably secured to a sewing machine frame, ashaft journaled in the hearing, a pulley on the shaft normallypositionecl to be operated by a belt on the sewing machine, a Workholder and means mounted on the first frame and operable by the shaftfor moving the work holder relatively to the sewing machine frame.

5. In a feeding device for producing a spiral stitch, a frame having ahorizontal portion normally disposed against the under side of a sewingmachine frame and portions with bearings, a shaft journaled in one ofthe bearings having a member for engagement by a moving part of a sewingmachine, a second shaft journaled in another bearing, means by which thesecond shaft is adapted to be rotated by the first shaft, a third shaftjournaled in another bearing, means by which the third shaft is adaptedto be rotated by the second shaft, a fourth shaft, means for rotatingthe fourth shaft by the third shaft at any one of a plurality ofdifferent speeds relatively to the third shaft, a work holder and meansin connection with the fourth shaft for moving the work holderrelatively to the frame.

6. In a feeding device for producing a spiral stitch, a frame having aslot and bearings, a shaft journaled in the bearings and provided with athread, a work holder having a member with a bearing, a stud disposed inthe last mentioned bearing and having a tooth normally engaging thethread, resilient means for holding yieldingly the stud with its toothin engagement with the thread, a button on the stud and a memberslidable in the slot and se cured to the frame in adjusted positions,having means for engaging the button for moving the stud to a positionwhere its tooth is disengaged from the thread.

BORIS TUCKER.

